IPM
INTELLIGENT
POWER MODULE
SELF DIAGNOSIS LAMPS
LD301
LD302
LD303
SERVICE SWITCH
Remove the compressor connector.
If your first attempt
fails, wait 3 minutes
(for the unit to re-
start) and check the
self-diagnosis lamp
status again.
Check outdoor electrical parts.
Check the refrigerating
cycle.
Normal
No
Yes
• Check the drive
circuit (IPM) using
the PRD checker.
• Check the position
sensor circuit.
With the unit set in the operating
state, press the start/stop
button.
Does the unit operate for
approximately 2 seconds (the
LD303 coming on) and then
stop due to a failure of switching
(the lamp blinking 4 times)?
OUTDOOR UNIT
- 81 -
To Next Page
Loading...
